Sarah started her November 1, 30-day credit card billing period with a balance of $200. She used her credit card to purchase medicaAon cosAng $75 on November 6th, paid for car repairs of $600 on November 10th, and made a small payment of $100 on November 20th. her annual credit card interest rate is 18%, compounded daily. How much interest will he be charged for the month of December, assuming the average daily balance method is used?

a) $7.86 b) $8.02 c) $9.17 d) $9.55